Hydrosoluble trisazoic dyes, mixtures thereof and the use thereof

ABSTRACT

The novel compound   IS A HYDROSOLUBLE DYESTUFF AND WHEN MIXED, IN AN AMOUNT OF 5-15% WITH 35-60% OF EACH OF THE COMPOUNDS:   AND   GIVES UNUSUALLY GOOD DYEINGS ON CELLULOSIC FIBERS, NITROGENOUS FIBERS AND LEATHER IN BLACK SHADES WITH REDDISH TO GREENISH NUANCES.

United States Patent [191 Papa et a1.

Aziende Colori Nazionali Affini ACNA S.p.A., Milan, Italy Filed: Apr. 1, 1974 Appl. N0.: 456,948

[73] Assignee:

[30] Foreign Application Priority Data Mar. 27, 1973 Italy 22204/73 [52] US. Cl 8/26; 260/173; 8/41 B; 8/51; 8/54; 8/94.1 R [51] Int. Cl. C0913 27/00; C09B 45/48; C09B 31/16; C09B 33/13 [58] Field of Search 8/26 Reierences Cited UNITED STATES PATENTS 3/1937 Clingenstein 260/74 1/1957 Huss et a1. t 260/168 3,030,352 4/1962 Jirou et a1 260/145 3,325,467 6/1967 Jirou et a] 260/145 FOREIGN PATENTS OR APPLICATIONS 666,026 2/1952 United Kingdom 785.101 10/1957 United Kingdom 1,098,126 H1968 United Kingdom 1,038,893 10/ 1 953 France Primary Examiner-Donald Levy Assistant Examiner-A. L. Clingman Attorney, Agent, or Firm--Hubbell, Cohen, & Stiefel [5 ABSTRACT The novel compound Dec. 23, 1975 is a hydrosoluble dyestuff and when mixed, in an amount of 515% with 35-60% of each of the compounds:

H0 5 so H and gives unusually good dyeings on cellulosic fibers, nitrogenous fibers and leather in black shades with reddish to greenish nuances.

4 Claims, No Drawings HYDROSOLUBLE TRISAZOIC' DYES, MIXTURES THEREOF AND THEUSE THEREOF CROSS REFERENCE TO RELATED APPLICATIONS This application is related to copending application, Ser. No. 305,719, filed Nov. 13, I972, and now abanleather in black shades having reddish to greenish nuances. The invention also relates to the use of these dyes in the dyeing of the above mentioned substrates.

5 above mentioned substrates.

2. Description of the Prior Art In copending application Ser. No. 305,7l9, there are described dyes of the formulae:

and

doned the entire contents of which are expressly incorporated herein by reference.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to mixtures of hydrosoluble trisazoic dyes particularly suited for beihg used in dyeing cellulosic fibers, nitrogenous fibers and OH G 2 NW on 2 N=N G com1av=u on so H 0 H (II) These dyes, either alone, or in mixtures having more than about 70% and more than about 50% respectively do not give entirely satisfactory dyeings. The unsatisfactory dyeings obtained with these dyes will be described in greater detail below. It is an object of this invention to overcome the disadvantages of said dyes.

SUMMARY OF THE INVENTION The present invention provides, inter alia, dyeing mixtures consisting of mixtures of the following three compounds:

2 Q Q Q sc n and

OH H N=N 2 2 N=N com! =n sc n SO II (III) wherein the relative amounts of the three compounds vary within limited ranges.

While compounds (I) and (II) are described in appli cation Ser. No. 305,7l9, compound (III) has not been previously described and is, per se, a further aspect of this invention. According to the invention, it has been found that mixtures of the above mentioned three compounds in the following proportions:

Compound (I) 35 i 60% Compound (Ill 35 e 60% Compound (Ill) 5 I59? and preferably, mixtures consisting of 4045% each of compounds (I) and (II), and of about 8l5% of compound (Ill yield dyeings ofa black shade, showing the optimum technical and commercial characteristics.

It was found that compound (I), either alone or in mixtures having more than about 70% of said com pound gave good dyeings as far as hue and purity are concerned, but which were unstable to the attack of acid and alkaline agents, and above all to acid vapors. With respect to compound (II), either alone or in mixtures having more than about 50% of said compound, it was found that good dyeings were obtained as far as general fastness characteristics are concerned, but which showed a hue having a decidedly greenish flash which is unacceptable with regard to the presently prevailing technical and commercial requirements. Compound (III), although endowed with characteristics particularly suited for natural and synthetic polyamidic fibers, gives a violaceous black hue that makes this compound unsuitable for meeting present market requirements when used alone.

Moreover. the use. instead of compound (III), of other compounds of similar structure and hue, such as those obtained by substituting, for example, in the for mula of compound (Ill the l-amino-8-naphthol-4-sulphonic acid moiety with the 2-amino-5-naphthol-6-sulphonic acid or the 2-amino-5-naphthol-7-sulphonic acid moieties, do not lead to the obtention of those dyeing characteristics needed for commercial applications.

The mixtures of dyes according to the invention may be obtained either by simply mixing together the three compounds (I), (II) and (III) in the above indicated ratios, or by a technically much easier and quicker method. This method comprises coupling the intermediate diazo-compound:

wherein X is an anion, preferably the anion of an inorganic acid such as sulphuric or hydrochloric acid with the three coupling agents: m-phenylene-diamine, m-aminophenol and l-amino-8-naphthol-4-sulphonic acid in the required stoichiometric ratios and following suitable reaction procedures.

The most preferred method comprises first coupling the diazo-compound (IV), at a pH of about 8.5 9. with a mixture of the two coupling agents: l-amino-S- naphthol-4sulphonic acid and m-aminophenol in the QBFN @bhNQ CONH N=Ni s0 a required ratios, and then, after adjusting the pH of the reaction mass to about 7, with m-phenylendiamine.

The new dye mixtures of the invention are excellent for dyeing cellulosic materials, natural and synthetic nitrogenous fibers such as cotton and regenerated cellulose, wool, half-wool, silk, nylon, leather and paper.

These novel mixtures allow one to create black shades of excellent applicative and general fastness characteristics which in particular enable one to substitute for the benzidinic Direct Black dye no. 38, CI. 30,235, throughout the entire range of its applicationsv The novel compound (III) may be obtained by coupling the diazo-compound (IV) with l-amino-S-naphthol-4 sulphonic acid at a pH of about 8.5 9, at a temperature between 3 and 7C.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The following examples will illustrate, without any limitation of the scope of the invention being intended thereby, the general aspects of the invention. All parts and percentages given are by weight, unless otherwise indicated.

EXAMPLE 1 22.7 parts of 4,4'-diamino-benzanilide, suspended in 30 parts of water, and 52 parts of hydrochloric acid of 20 Be, after being cooled by adding 150 parts of ice, were tetrazotized by dripping in, at 0 5C, 14 parts of NaNO in 60 parts of water. After stirring for 60 minutes, the excess nitrous acid was eliminated by adding sulphamic acid.

3l parts of l-amino-8-oxynaphthalen-3,6-disulphonic acid in 100 parts of water and l3 parts of NaOH of 36 Be were dripped, over a 1 hour period onto the tetrazo solution, while keeping the temperature at between 2 5C by means of ice, and maintaining the pH at 1.5 1.7.

The reaction mass was then kept under stirring for 16 18 hours, while allowing the temperature to rise to Separately, 8 parts of aniline dissolved in 60 parts of water and 23 parts of HCl Be were diazotized with 6.0 parts of NaNO in 25 parts of water. After minutes of stirring, the excess nitrous acid was removed by adding sulphamic acid.

The solution of the diazotized aniline was p r over the mass of the previously obtained monoazoic product, and then cooled to 3 5C with ice. Thereupon the pH was quickly raised to 8.5 8.7 by pp onto it a 20% aqueous solution of Na- CO After 20 hours at 3 5C and with a pH of 8.5 3.7. there was observed only a trace of excess diazotlzed aniline.

Onto the whole mass, there was then rapidly discharged a solution of 2.38 parts of l-amino-8-naphthol 4-sulphonic acid and 4.32 parts of m-aminophenol m parts of water and 6.7 parts of NaOH 36 Be.

The mass was then stirred for 30 minutes at 5 7 and at a pH of about 9. The pH was then adjusted to 5 about 7 by adding 8 parts of HCl 20 Be and to the solution there were then added 4.32 parts of mphenylendiamine in 20 parts of water. I

The whole mass was then kept under stirring for at least 5 hours. At the end of the coupling the mass was acidified to Congo Red paper with 52 parts of HCl 20 Be. It was then heated to 80C over a period of 45 minutes and maintained at this temperature for 45 minutes. Thereafter it was filtered under vacuum and then squeezed dry.

The thus obtained product, after being dried at 70 required ratios, and then, after adjusting the pH of the losic and polyamide fibers to a full black hue of bright aspect and with a reddish tinge.

EXAMPLE 2 Following the procedures described in Example 1, but using instead of 2.38 parts of 1-amino-8-naphthol- 4-sulphonic acid (a) and 4.32 parts of mphenylenediamine (b), 1.905 parts of compound (a) and respectively 4.55 parts of compound (b), there was obtained a dye of similar characteristics to that of Example 1, but having a hue with more reddish flashes.

EXAMPLE 3 Preparation of Compound (III) 22.7 parts of 4,4-diamino-benzanilide, suspended in 30 parts of water, and 52 parts of hydrochloric acid of 20 Be, after being cooled by adding 150 parts of ice,

were tetrazotized by dripping in, at C, 14 parts of NaNO in 60 parts of water. After stirring for 60 minutes, the excess nitrous acid was eliminated by adding sulphamic acid.

31 parts of 1-amino-8-oxynaphthalen-3,6disul' phonic acid in 100 parts of water and 13 parts of NaOH of 36 Be were dripped, over a 1 hour period onto the tetrazo solution, while keeping the temperature at between 2 5C by means of ice, and maintaining the pH at 1.5 1.7.

The reaction mass was then kept under stirring for 16 18 hours, while allowing the temperature to rise to C.

Separately, 8 parts of aniline dissolved in 60 parts of water and 23 parts of HCl Be were diazotized with 6.0 parts of NaNO in parts of water. After minutes of stirring, the excess nitrous acid was removed by adding sulphamic acid.

The solution of the diazotized aniline was poured over the mass of the previously obtained monoazoic product, and then cooled to 3 5C with ice. Thereupon the pH was quickly raised to 8.5 8.7 by dripping onto it a 20% aqueous solution of Na CO After 20 hours at 3 5C and with a pH of 8.5 8.7, there was observed only a trace of excess diazotized aniline.

Onto the whole mass, there was then rapidly dis charged a solution of 23.8 parts of l-amino-8-naphthol- 4-sulphonic acid dissolved in 100 parts of water and 12 parts of NaOH 36 Be. This mass was then kept under stirring for between 16 and 18 hours at a pH of about 9 and at a temperature of between 15 and 20C.

EXAMPLE 4 0.3 part of the mixture of dyes prepared in Example 1 was dissolved in 200 parts of hot purified water, the solution then being placed into a suitable dyeing vessel.

Into this vessel there were then introduced 10 parts of a cotton yarn and heating was started, while subjecting the hank to stirring, until the temperature gradually reached 90C. After 15 minutes from the time that this temperature was reached, there were introduced into the vessel 3 parts of Na SO while still keeping the hank under stirring. The dyeing was carried on for a further 30 minutes after which the dyed material was extracted from the vessel and thoroughly washed in cold water and then dried. In this way a full black dyeing was obtained which had the characteristics described in Example 1.

Variations and modifications can, of course, be made without departing from the spirit and scope of the invention.

Having thus described our invention, what we desire to secure by Letters Patent and hereby claim is:

l. A mixture of hydrosoluble trisazo-dyes consisting of from -60% of a compound of the formula:

from 35-60% of a compound of the formula:

and from 5-15% of a compound of the formula:

2. A mixture as claimed in claim 1 and consisting of: nous fiber with the mixture of hydrosoluble trisazo- 4O 45% of the compound of formula (I), dy as Claimed in Claim 1- 40 45% of the compound of formula (ll) and 4. Articles of cellulosic or nitrogenous fibers dyed or 8 15% of the compound of formula 5 printed with the mixture of hydrosoluble trisazo-dyes of 3. A method comprising dyeing a natural or regenerdaim 1. ated cellulosic fiber, or a natural or synthetic nitrogeage UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent No. 3,927,963 Dated December 23, 1975 Inventor(5) SISTO SERGIO PAPA et a1 It is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below:

Column 2, lines 4-5: "above mentioned substrates above mentioned substrates should read above mentioned substrates.

Column 5, lines 11-13: "70 required ratios, and then, after adjusting the pH of the losic and polyamide fibers" should read 70-80C. for about 24 hours, is suitable for dyeing cellulosic and polyamide fibers s'gmd and Scaled thi SE 1 1 AL] wentymnth Day of M1976 Arrest:

RUTH C. MASON Afltsling o a ALL DANN Commissioner uj'larenrs and Trad A 

1. A MIXTURE OF HYDROSOLUBLE TRISAZO-DYES CONSISTING OF FROM 35-60% OF A COMPOUND OF THE FORMULA:
 2. A mixture as claimed in claim 1 and consisting of: 40 - 45% of the compound of formula (I), 40 - 45% of the compound of formula (II) and 8 - 15% of the compound of formula (III).
 3. A method comprising dyeing a natural or regenerated cellulosic fiber, or a natural or synthetic nitrogenous fiber with the mixture of hydrosoluble trisazo-dyes as claimed in claim
 1. 4. Articles of cellulosic or nitrogenous fibers dyed or printed with the mixture of hydrosoluble trisazo-dyes of claim
 1. 